MBIO 3401 EXAM QUESTIONS AND ANSWERS |
WITH COMPLETE SOLUTION
In anoxygenic photosynthesis, which compound (or compounds) is (are) used by purple and
green bacteria as a source of electrons for the reduction of CO2?
H2O
In an ecological sense, the variety of photosynthetic pigments found among different
groups of photosynthetic bacteria allows them to:
avoid direct competition by absorbing different wavelengths of light
Rickettsias and Chlamydias are two unrelated groups of bacteria that nevertheless share a
unique characteristic. This characteristic is:
they are both obligate intracellular parasites of eukaryotes
what important soil process are these chemolithotrophic bacteria involved in?
nitrification
a student in lab inoculates several spread plates of E. coli and then irradiated them with
ultraviolet light to determine the rate of cell killing. No decrease was seen in the number of
colonies on the irradiated plates compared to the non-irradiated plates. What mistake did
this student probably make?
he left lids on the spread plates and the ultraviolet light was unable to penetrate the plastic barrier
spirochetes that are known human pathogens include:
two or more of the above answers are correct
, As discussed in lecture, which of the following bacteria are aerobic chemolithotrophs?
nitrobacter
The hypothesis has been proposed that magnetotactic bacteria sense the Earth's magnetic
field in order to:
swim in the direction of a microaerophilic environment
What evidence suggest that cyanobacteria-like ancestor were present on the Earth as early
as 3.5 billion years ago?
fossilized stromatolites
Many of the magnetotactic bacteria are found among the:
spirilla
In lecture, Hyphomicrobium was given as an example of a:
budding bacterium
Current estimates are that ___________ of the microorganisms in a typical environmental
smaple, such as soil or water, have bee cultivated before in the laboratory?
less than 1%
The currently accepted division of all living organisms on earth int three domains is based
on differences in what fundamental characteristics?
small subunit ribosomal RNA sequences
From reading your textbook, metagenomics refers to:
WITH COMPLETE SOLUTION
In anoxygenic photosynthesis, which compound (or compounds) is (are) used by purple and
green bacteria as a source of electrons for the reduction of CO2?
H2O
In an ecological sense, the variety of photosynthetic pigments found among different
groups of photosynthetic bacteria allows them to:
avoid direct competition by absorbing different wavelengths of light
Rickettsias and Chlamydias are two unrelated groups of bacteria that nevertheless share a
unique characteristic. This characteristic is:
they are both obligate intracellular parasites of eukaryotes
what important soil process are these chemolithotrophic bacteria involved in?
nitrification
a student in lab inoculates several spread plates of E. coli and then irradiated them with
ultraviolet light to determine the rate of cell killing. No decrease was seen in the number of
colonies on the irradiated plates compared to the non-irradiated plates. What mistake did
this student probably make?
he left lids on the spread plates and the ultraviolet light was unable to penetrate the plastic barrier
spirochetes that are known human pathogens include:
two or more of the above answers are correct
, As discussed in lecture, which of the following bacteria are aerobic chemolithotrophs?
nitrobacter
The hypothesis has been proposed that magnetotactic bacteria sense the Earth's magnetic
field in order to:
swim in the direction of a microaerophilic environment
What evidence suggest that cyanobacteria-like ancestor were present on the Earth as early
as 3.5 billion years ago?
fossilized stromatolites
Many of the magnetotactic bacteria are found among the:
spirilla
In lecture, Hyphomicrobium was given as an example of a:
budding bacterium
Current estimates are that ___________ of the microorganisms in a typical environmental
smaple, such as soil or water, have bee cultivated before in the laboratory?
less than 1%
The currently accepted division of all living organisms on earth int three domains is based
on differences in what fundamental characteristics?
small subunit ribosomal RNA sequences
From reading your textbook, metagenomics refers to:
